<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" />
      </div>
      <!-- 登录表单区 -->
      <el-form
        :model="loginForm"
        ref="loginForm"
        class="login_form"
        :rules="loginFormRules"
      >
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input
            v-model="loginForm.username"
            prefix-icon="iconfont icon-user"
          ></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            prefix-icon="iconfont icon-3702mima"
            type="password"
          ></el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm('loginForm')"
            >重置</el-button
          >
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  components: {},
  props: {},
  data() {
    return {
      // 这是登录表单的数据绑定对象
      loginForm: {
        username: "admin",
        password: "123456",
      },
      // 这是表单的验证规则对象
      loginFormRules: {
        // 验证用户名是否合法
        username: [
          { required: true, message: "请输入用户名", trigger: "blur" },
          {
            min: 3,
            max: 10,
            message: "长度在 3 到 10 个字符",
            trigger: "blur",
          },
        ],
        // 验证密码是否合法
        password: [
          { required: true, message: "请输入密码", trigger: "blur" },
          {
            min: 6,
            max: 15,
            message: "长度在 6 到 15 个字符",
            trigger: "blur",
          },
        ],
      },
    };
  },
  watch: {},
  computed: {},
  methods: {
    // 点击重置按钮，重置登录表单
    resetLoginForm(formName) {
      this.$refs[formName].resetFields();
    },
    login() {
      this.$refs.loginForm.validate(async valid => {
        if (!valid) return;

        const { data: res } = await this.$http.post("/login", this.loginForm);

        console.log(res)

        if(res.meta.status !== 200) return this.$message.error('登录失败，用户名或密码错误')
        this.$message.success('登录成功')

        /**
         * 1.将登录成功之后的 token 保存到客户端的 sessionStorage中
         *    1.1 项目中除了登录之外其他API接口，必须在登录之后才能访问
         *    1.2 token 只应在当前网站打开期间生效，所以将 token 保存在sessionStorage 中
         * 2.通过编程式导航跳转到后台主页，路由地址是 /home
         */

        let token = res.data.token

        sessionStorage.setItem('token',token)

        this.$router.push({
          path:'/home'
        })

      });
    },
  },
  created() {},
  mounted() {},
};
</script>

<style scoped lang="less">
.login_container {
  height: 100%;
  background-color: #2b4b6b;
  .login_box {
    width: 450px;
    height: 300px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);

    .avatar_box {
      width: 130px;
      height: 130px;
      border: 1px solid #eee;
      border-radius: 50%;
      padding: 10px;
      box-shadow: 0 0 10px #ddd;
      position: absolute;
      left: 50%;
      transform: translate(-50%, -50%);
      background: #fff;
      img {
        width: 100%;
        height: 100%;
        border-radius: 50%;
        background-color: #eee;
      }
    }

    .login_form {
      position: absolute;
      width: 100%;
      padding: 0 20px;
      bottom: 0;
      box-sizing: border-box;
    }

    .btns {
      display: flex;
      justify-content: flex-end;
    }
  }
}
</style>
